tree 6be801bb3a9637f70e2881d27b3d1b4a6543916d
parent fe1ebcd2cf6cd928738055b4307b03196c412f70
author Willy Tarreau <w@1wt.eu> 1419273240 +0100
committer Willy Tarreau <w@1wt.eu> 1419330159 +0100
encoding latin1

BUG/MAJOR: stream-int: properly check the memory allocation return

In stream_int_register_handler(), we call si_alloc_appctx(si) but as a
mistake, instead of checking the return value for a NULL, we test <si>.
This bug was discovered under extreme memory contention (memory for only
two buffers with 500 connections waiting) and after 3 million failed
connections. While it was very hard to produce it, the fix is tagged
major because in theory it could happen when haproxy runs with a very
low "-m" setting preventing from allocating just the few bytes needed
for an appctx. But most users will never be able to trigger it. The
fix was confirmed to address the bug.

This fix must be backported to 1.5.